Waterdrop G5P700A
#2 in TanklessFull review
For a buyer who wants certified RO with mineralized water and a smart faucet for around $300.
Amazon $309.99$309.99
3.6/5
For a household that wants a certified tankless RO system with a smart faucet at a mid-range price. Its NSF 58 listing is the main reason to pick it over cheaper tankless units.
- 600 gallons a dayOutput
- 2:1Pure to drain
- $145 a yearFilters
- YesNSF/ANSI 58
Check price at Amazon$439
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Certified to NSF/ANSI 58 by IAPMO, so the TDS reduction is verified by a third party
- Tankless and compact, leaving room in the sink cabinet
- The faucet shows water quality and when each filter is due
- Fills a glass quickly enough for cooking pots and kettles
Cons
- Only a 1-year warranty
- Needs a power outlet under the sink
- No mineral stage, so the water tastes flat to some people
The Waterdrop G3P family
Every Waterdrop G3P model we rank, smallest first. Ratings compare each against its own type.
| Model | Output | Rating | Price |
|---|---|---|---|
| Waterdrop G3P600 (this one) | 600 gallons a day | 3.6/5 | $439 |
| Waterdrop G3P800 | 800 gallons a day | 3.4/5 | $849 |
How it scores
The rating comes from 6 measured or published factors, each scored 0-100 against fixed reference points for its type. How we rank explains each one.
Specifications
| Model number | WD-G3P600 |
|---|---|
| Filtration | |
| Output | 600 gallons a day |
| Pure to drain | 2:1 |
| Stages | 8 |
| Remineralization | No |
| NSF/ANSI 58 | Yes |
| Other certifications | NSF/ANSI 42, 53, 372 |
| Replacement filters | $145 a year |
| Build | |
| Tank | Tankless |
| Booster pump | Yes |
| Smart faucet | Yes |
| Warranty | 1 year |
Alternatives in this type
Delta Clarifi Tankless RO
#3 in TanklessFull review
For a household that wants a broadly certified tankless system with low running costs and a long warranty. Budget buyers can get similar output for less.
Amazon $799$799
Waterdrop X12
#5 in TanklessFull review
For a large household that wants the fastest flow and lowest waste, and will pay a premium for it.
Amazon $1,099$1,099
Compare
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